Luis Miguel ‘Chapulín’ Díaz Castell (born 1 December 1977, in Mexico City) is a Mexican racing driver who competes in the American Le Mans Series for Level 5 Motorsports.
He won the 2009 American Le Mans Series LMP2 class drivers championship alongside team owner Adrián Fernández, and was runner-up in the 2005 and 2006 Rolex Sports Car Series DP drivers championship.
Díaz also has an extensive open-wheel racing background.